CALL and END keys on Storm 2 - anyone else having issues with these keys being dodgy?

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I've found that my "call" and "end" keys aren't always pressing down when I try to click them. It's like the screen doesn't recognize it, and refuses to click. I have to re-press to get it to work. My wife's S2 works flawlessly. I can't help but think this is a fit and finish issue, which I would have hoped would have been perfected by now... but maybe I just got a bad one.